Pulley



Patented Nov. 8, 1932 UNITED STATES LOUIS o. BENDIT, or KANSAS c1rY,f1urssoURI v PULLEY Y,Animation filed oetoer 24,1929. YserialN0'.* 4.o`2`,24 5'. l

light material comprising metal rings hav.-n ing smooth faces.

It has heretofore, however, been impracticable to Aform a grooved sheave of sheet-metal, and grooved metal sheaves therefore have ordinarily comprised castings in which the groove-forming ele-Y ments areintegral with the rim and spokes of the wheel.k

. Further objects of my invention,therefore are tofapply groove-forming elements to a steel pulley whereby a relatively light pul- 20 ley maybe provided with grooves to form alight grooved sheave, to form a smooth pulleyrim and a corrugated rim of lightsheet material Vand attach the two to comprise a unit, and to reinforce the light `walls of the 12,5 'groovesV to sustain the pressure of belts operating on the sheave. Y

In accomplishingthese andi other objects of the invention, I have provided'improved .detailsof struct-ure, the preferred forms of which are illustrated in the accompanying drawing, wherein: f Fig. 1 is aside elevation of al pulley constructed in accordance with my invention, the corrugated rim being shown in section. Fig. 2 is a perspective view of the two portions of a split'pulley illustrated in spaced vrelation and constructed in Vaccordance with my invention; v v Y f Fig. 3 is a section through a portionof the pulley on al plane including the aXisof the pulley. Y 'Y l Referring in detail to the drawing: 1 and 2designatemating halves of a split pulley including tubular hub shell portions `3 adapted :to be secured together by bolts 4 tical wallse11` while the interior walls 12 to forma hub and join the'halves of the pulley. The halves in cludespokes 5 and sheet metal rim kkmembers 6 having rolled tubular edges 7.., i j

YWhen connected and secured0 together, the halves 'form va relatively light pulley havingV a continuous rim, the face of the rim being smooth.V My invention pertainsjparticularly to a supplementa-l rim comprising similarcorrugated stripsadapted to'be mounted on .the respective rim portions of the steel wheel including edge flanges 9 voverlying the rims y6 adjacent' the 4edges and secured thereto preferably bywelding. y The corrugated .rim members areformed of'relatively light steel sheeting having regular Vfshaped ydepressions or grooves f 10 adapted for' alignment upon` assembly of the pulley members to form continuous annular grooves on the periphery of the pul-v ley. v

. The strips are upturned at the inner edges of the flanges 9 to form substantiallyr verformed .byydepressing the material to pro- ,duce the grooves are inclined to confer the kV-shapedcharacter on the grooves.

' The walls 11 and'12 are formed with rela-V tion to each other to bring the rib-like under surface tol the sheet at the apices of the*l grooves intov engagement with the face of the rims and are welded theretoas indicated vat13.

I 'further provide vreinforcing'fmembers SO such-as '14V and 15 located in the recesses formed' by adjacent walls of the corrugated rim and fixed toftherimA members 6. by'welding vindicated at 1 6.l l The reinforcing memf bers are fixed to the rim members. G before g5 v the corrugated rim'is installed, the members '14 Ybeingrelatively small to assure proper*v form for the outer walls'11 and adjacent inner inclined walls for: engaging. the same. The rmembers 15 vrare relatively large to ac- 90 Ill in said corrugation from the'opposite yedgeof the pulley half.

In using the invention, a metal wheel prof vided with a smooth rim maybe provided eitherin split or complete form-to' receive thecorrugated rim. In the illustrated application of the invention, a split pulley is shown .and the corrugated rim is provided in halves and fixed to the smooth peripheral surface of the rims of said halves. The reinforcing members are preferably-welded to the rims of the split halves in suitable position for forming staggered projecting ends of rods andthe corrugated strips are welded to the rim members with the corrugations overlying the reinforcing membersl and the walls of the corrugations engaging said members.

A `relatively light weight wheel may thus be constructed and a corrugated rim may be applied to the smooth periphery of a wheel at'. relatively smallV cost to form a grooved sheave.

sul

What I'claim and desireto secure by Letters Patent is: o K

1. In a pulley including a Wheel having a smooth rim, a series of cylindrical reinforcing members xed to the rim in spaced relation forming peripheral bosses on the rim, and a groove-forming strip fixed to the wheel rim having V-shaped depressed portions extending between the reinforcing members. to the wheel rim -andiixed to Ithe rim, the `side ywalls of the strip forming the depressions engaging the reinforcing members, whereby stresses on the `strip walls may be transmitted through thereinforcing members to thewheel.

2. A pulley including a wheel having a smooth rim, a series of rod-like reinforcing members mounted circumferentially on the Vrim in spaced relation, and a groove-forming strip to receive a belt, said strip having V-shaped depressed portions extending between the reinforcing members to the wheel rim, the inclined side walls of the depressed portions engagingthe reinforcing members Y Vfor transmit/ting belt stresses through the re- Vinforcing members to theV wheel.

3. A belt supporting pulley comprising in combination with a wheel having a smooth rim, a groove forming strip having edge anges fixed to the wheel rim and V-shaped depressions producing inclined walls and forming inner ridges engaging the rim, and reinforcing members engaging the rim and the inclined walls of the strip for transmitting belt stresses on the strip walls to the wheel. f

4. A split pulley comprising a. pair of segmental sections,'each section comprising a smooth rim and a hub joined by spokes, a series of rod-like members mounted circuinferentially on the rim in spaced relation, and

a groove-forming strip to receive a belt, said strip having V-shaped -depressed portions extending between the reinforcing members to the wheel rim, the inclined side walls of the depressed portions engaging the reinforcing members for transmitting beltv stresses through the reinforcing ,i members to lthe wheel. e N Y,

5. A-split pulley comprising a-pair of segmental sections, each section-comprising a smooth'frim and a hub joined by spokes, a groove-'forming strip having edge flanges fixed to the wheel rim Vand'V-shaped depressions producing inclined walls and forming inner ridges engaging .the rim, andreinforcing` members engaging the rim and said inclined wallsy for transmitting belt stresses on the strip walls tothe wheel.

6. A 'split pulley comprising a pair of segmental-sections, eachfsection` comprising a rim and a hub joined by 'spokes said rim having a smooth outer face, a groove-formv 7.v A split pulley comprising a pair ofseg-` mental sections, each section comprising a smooth rim and a hubY joined by spokes, a

groove-,forming strip having edge flanges fixed to lthe wheel rim and V-shaped depressions forming inner ridges engaging the rim, and common vmeans for individually-reinforcing each depression of the strip and for holding thetwo halves of the pulley in alignment.v Y Y Y 8. VA split pulley comprising segmental sections, each section having a smooth'rim and a hub portion joined by spokes, a grooveforming strip having edge flanges fixedto the wheel rim, and longitudinal depressions forming both inner ridges engagingthe rim andv inner recesses between said ridges, and means extending into the innerrecesses of adjoining sections for'holding the sections "in alignment.

Y tions, each section having asmooth rim and a iio hub portion joined byl spokes, a groove-formi ling strip having edge flanges fixed tothe wheel rim and longitudinal depressions forming both inner ridges engaging the rim and inner recesses between said ridges,`and longitudinal reinforcing members in said recesses engaging the rim and having portions projecting from onesection and adapted to extendinto aligning recesses of an adjoining sectionrtohold said sections in alignment. Y' Y In testimony whereof I affix my signature.

LOUIS C. BENDIT. 

